Blackout Dates are a way for your company to block off specific time periods/date ranges, prohibiting certain users from running Mass Notification or Mass Offer campaigns during that window. For example, this may be useful for when your company is deploying a global campaign with a message targeted to all of your loyalty users at all of your locations and you want to make sure there won't be any local Franchisee running a messaging campaign at the same time, causing a conflict or simply overloading guests with too many messages.